That makes sense then. He was a different singer on the albums he did with them in the late '90s/early '00s.
Listened to Undead yesterday. Quite enjoyed it. Not sure what I'd sampled before but was pleasantly surprised. Sounds a bit 'amateur ' in places but I liked it. Very different from Serious Black.
If you want something a little proggier, try the album just before Undead, A Mended Rhyme, next--one of my all-time favorite albums. The production quality isn't very good (mostly the guitar sound's fault), and a few of the doomish tracks may bore some people, but the title track, Time of No Sun, Circuit Vision and Guest of the Inquisition are amazing. For me, it was all downhill from there, but Undead and Matters of the Dark are both excellent albums, and Modus Vivendi, while over-polished, has several very good tracks as well and is the overall fan favorite. The newer albums are a lot like Modus but with a different singer--he's good, but no breed.